Neo-Geo Forums

I got a new copy of Party Mail this weekend and it came with a wierd plastic thing that slides onto the top of the cartridge. A few of my jap games have inserts for this plastic thing in their boxes but none of them have the slide/slot on the cart, just Party Mail.

What is this plastic thing for? The only thing I can think of is that it makes the cart easier to pull out of the NGPC, but that was never a problem in the first place.

Wierdness.

Also, anyone know how to play Party Mail?